Changed logic regarding minDate and maxDate in dateTime module to allow currentDate to be equal to one of them

[peter-witt]

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PR Description

Changed logic regarding minDate and maxDate in dateTime module to allow currentDate to be equal to one of them.
This is to make it possible to have two dates as allowed dates, and preselect one of them, which was not possible before. The user was able to select one of the two dates, but the code was not allowing preselection of the dates. For example with these dates:

minDate = 2021.01.01
maxDate = 2021.01.02
currentDate = 2021.01.01